Alvania almo

The length of the shell attains 3 mm to 4.7 mm. The shell is imperforate. It has rounded longitudinal ribs and about equal interspaces. it is yellowish brown, with a brown subsutural band and three more on the base. The lip is simple and sharp. The minute, broadly oval shell is yellowish white. The 1½ whorls of the protoconch are well rounded and smooth. The whorls of the teleoconch are somewhat inflated and slopingly shouldered at the summit. They are marked by very slender, almost vertical axial ribs, of which 18 occur upon the first, and 20 upon the penultimate turn. In addition to the axial sculpture, the whorls are marked between the sutures by two spiral cords equaling the ribs in strength. Of these, the first is a little posterior to the middle of the whorls, bounding the sloping shoulder, while the second is halfway between it and the suture. The intersections of the axial ribs and spiral cords form slender tubercles, while the spaces enclosed between them are well impressed, squarish pits. The spaces enclosed between the first spiral cord and the summit and the axial ribs are rhomboidal areas, having their long axes parallel to the axial sculpture, while the spaces enclosed between the second spiral cord and the axial ribs and the suture are squarish pits. The suture is moderatelyconstricted. …